Practice Problems

Question: All the following statements are true except A. chemical bonds form because one or more electrons are attracted simultaneously by two or more nuclei B. for a given pair of bonded atoms, the bond distance and bond energy are more or less constant from one species to another C. bond distance increases as bond energy decreases D. for a given pair of atoms, bond energy decreases in order: triple bond > double bond > single bond Answer: C

Question: Which group do the following elements belong to? Be, Mg, Ba, and Ra A. alkali metals B. alkaline earth metals C. noble gases D. none of the above Answer: B

Question: Which of these below are examples of electromagnetic energy? A. radio waves B. infrared radiation C. visible light D. all of the above Answer: D

Question: The electrons generally involved in bonding A. lie close to the nucleus B. have small ionization energies C. end up being completely transferred from one atom to another D. occupy s atomic orbitals Answer: B

Question: In which of the following species would a Lewis structure show a double dond between two carbon atoms? A. C2F2 B. C2HF C. C2H3F D. C2H5F Answer: C

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